Railway-locomotive.



M. MAHONBYL RAILWAY 'LOGOMOTIVE. APPLICATION FILLED MAR. 20, 1911.

Patented Nov} 18 f5 2 snnm msm i.

I VENTOR WITNESSES:

M. MAHONEY. RAILWAY LOGOMOTIVE.

APPLICATION FILED MAR. 20,:1911.

Patnted N0v.'18 1913.

HEETS-SHEET 2.

WITNESSES ATTORNEY resident of 'Wilkinsburg, in the county of q UNIT-ED STATES E T ()FFIC' MYIJES MAHONEY, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC AND EIANUFACTUEING COMPANY, A CORPORATION OF PENNSYLVANIA.

RAILWAY-LQGOMOTIVE.

To all whom itvmay concern:

subject of the King ofGreat Britain, and a Allegheny and State of Pennsylvania, have invented a new 5 and useful Improvement in Railway-Locomotives, of which the follow ing is a specification.

My invention relates to railway locomotives and more especially to such locomotives as are equipped with and propelled by electric motors, though not necessarily restricted, as regards all of the features, to locomotives propelled by electric power.

The object of my invention is to provide a locomotive having a centrally located truck constituting a rigid wheel base and a four-wheel radial truck at each end thereof which shall be so designed and constructed with reference to the locomotive frame that the locomotive may follow the track with a minimum amount of wear and danger of derailment and in which the draft connections between the radial trucks and the locomotive frame shall be free from compression strains when such radial trucks are sub jected to a pushing or a bumping action.

In the accompanying drawing, F ig'ure- 1 is a plan View of substantially one-half of the truck structure of a locomotive constructed in accordance with my invention, parts being broken away, and Fig. 2 is a side elevation of substantially one-half of a locomotive constructed in accordance with my invention, parts being broken away and in section.

The main frame 1 of the locomotive may be of usual construction and is provided with a body or cab '2, in accordance with the usual practice. Mountediabove' each pair of main truck wheels 3, constituting the rigid wheel base, only one of which is shown,

is a pair of propelling electric motors l which may be suitably geared to 'the wheels 3 or Wheel axles 5 and beneath each end of the cab and main locomotive frame is mounted a four-wheel truck 6, the larger pair of wheels 7 of which correspond in size and general arrangement to the main wheels 3 constituting the rigid wheel base, and abovethese are mounted a pair of electric motors 8 'which may be geared to the wheels 7 or their-axle 9 in any suitable well known manner. The end beam 10 of themain truck frame is provided with an end piece 11, the

I Specification of Letters Patent. Application filed March 20, 1911. Serial No. 615,537.

outer face of whichis convex, the radius or curvature having its center in a cross tie 12 located between the larger. wheels of the radial truck and the adjacent wheels 3 of the main truck.

A central longitudinal beam 13 of the frame of the radial truck is provided with a plate 14 having a concave face which cor responds in curvature to that. of the end piece 11. surfaces may have free relative movement as the radial truck moves circumferentially in accordance withthe curvature of the truck,

the truck is provided with a cross beam 15 between its smaller and larger wheels and beneath the end beam 10 of the main frame, and to this beam 15, are pivotally attached the ends of a triangular shaped radius frame or bar 16 by means of pins17. The rear endof the radius bar or frame 16 is piv-v otally attached to the cross tie 12 by means of a pin 18, the axis of which is the center of theradius of curvature of the faces of the plates 11 and 1 1. Connection between the pin 18 and the cross tie12 is effected by means of a block 19 and a socket 20 in which the block has a limited degree of movement lengthwise of the truck. It will be understood that, by reason of the lost motion afforded by the construction just referred ,to, under normal. operating conditions of a locomotive, there will be a slight degree of separation between the end piece 11 and the plate 14land the radial truck will be free to move with referenceto the rigid wheel base, within reasonable limits. In case of a pushing or a bumping action against the part 21 or the draw bar 22 of the locomotive, by reason of engagement with another railway vehicle or a station-- -ary bumper, end p-iece'll of the main frame will receive the impact and thus relieve the radius frame and the cooperating parts from compression strains.

I claim as my invention:

1. In a locomotive, the combination with amain truck having a rigid wheel base and a propelling motor, of a four-wheel end truck having 'a propelling motor, radius ban; or frame pivotally connectedvto said main truck, and means for relieving said radius bar or frame from longitudinal com-- pression strains.

2. In. a locomotive, the combination with a main truck having a rigid wheel base and Patented Nov. 18, 1913.

In order that'the two adjacent main truck frame and the end truckframe,

3. In a locomotive, the combination with a main track having a rigid Wheel base and a- .convex hearing block at the end of lts frame, of a four-wheel end truck having .a concave bearing block on its frame to engage the convex bearing lock of the main truck frame, and a radius bar or frame in terposed between cross bars of the two truck irames and having a single lost-motion connection with the main truck frame.

4t. In a locomotive, the combination with a motor equipped main truck having side frames and a cross beam having an auto matically adjustable eenter blook, of a motor-equipped end truck. and arradius bar or,

bearing loloohp, of a motor-equipped end truck having" an end hearing block to engage the main truck hearing block, and a radius harinterposed between said trucks and having a lost-motion connection with one of them.

In testimony whereof, I have hereunto subscribed my namethis 14th day of March, 1911.

MYLE'S MAHONEY. 

